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類正五邊形摺法
Author:
連琨銘
GeoGebra
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球体的体积推导（优化版）
找出對稱軸
畫出對稱圖形
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
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堆一堆222
圓錐截橫
蜘蛛網
圆锥侧面的展开
橢圓代數性質,光學性質,生活應用
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Power Functions
Equilateral Triangles
Variance
Rhombus
Histogram